We'll plan to meet at the Carousel Plaza right by the entrance to the Fisher Children's Zoo (http://www.sfzoo.org/openrosters/ViewOrgPageLink.asp?LinkKey=13229&orgkey=1821) area. We'll hang out by the carousel until 2:15 (to give everyone a chance to get there) and then we can explore the rest of the Children's Zoo and beyond.
The zoo is open from 10 am until 5 pm on Saturdays so more adventurous families can certainly get there earlier and then just meetup at 2.
Hope to see you there!
P.S. The picture of the penguins above is of Roy, Silo, and Tango from the NY City Zoo. If you haven't read "And Tango Makes Three," its a great children's book about two male penguins who father a baby penguin. Check it out here. (http://www.amazon.com/Tango-Makes-Three-Peter-Parnell/dp/0689878451/ref=pd_bbs_2?ie=UTF8&s=books&qid=1207274238&sr=8-2)